Not at all. If the system pressurises, you'll be ok. If it doesn't you have no hope.
Depends on the model- M20 and M30 you have to bleed manually. All the later engines autobleed, so long as you follow the correct procedure. Most importantly you have to use the factory coolant, or Prestone, or a very few special others. Using any other 'compatible' coolant will end Burn Your Wallet later....